Based on the previously unexamined treaties and agreements, this article analyzes the civilian mechanism of ensuring Russia’s interest in Manchuria on the background of establishment and development of statehood of Hulunbuir District, also known as Barga. Having lost the Russo-Japanese War and a number of backbone territories, the Russian Empire took all necessary steps towards retention and strengthening of its influence in the region, was able to form the zones of primary interests, and this control the process of acquisition of relative autonomy by Barga. It is concluded that within the framework of considered agreements, Russia’ national interests in the Far East were reliably protected. It was achieved by the concessions, which by their legal nature significantly differed from the concessions and settlements created by the foreign powers in Eastern China, although were capable of ensuring Russia’s presence and safeguarding the strategic interests. Despite the fact that the created system demonstrated its effectiveness, it did not survive the political crises caused by the revolutionary events and demise of the Russian Empire. China’s leadership took advantage of the situation that unfolded in Russia, and liquidated the autonomy of Outer Mongolia, and later the status of Hulunbuir, stipulated in the agreements.